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(No Model.)

S. W. TAYLOR.

SIGHT PLUMB FOR FIRE ARMS. No. 316,416. Patented 'Apr. 21, 1885.

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N. PETERS. PhnwLimo m lm, Washin ton, D. Q

UNITED STATES ATENT OFFICE.

SYDNEY WENTWORTH TAYLOR, OF NEWPORT, RHODE ISLAND, ASSIGNOR TO EDWARD G.TAYLOR, OF NEW YORK, N. Y.

SlGHT- PLUMB FOR F l RE-ARIVIS.

SPECIFICATION forming part of Letters Patent No. 316,416, dated April21, 1885.

Applicaiion filed January 19, 1885. (No model.)

I 0 aZZ whom, it may concern:

Be it known that I, SYDNEY W. TAYLOR, a citizen of the United States,and a resident of Newport, in the county of Newport and State of RhodeIsland, have invented certain new and useful Improvements inSight-Plumbs or Devices for Keeping the Sights of a Gun in a VerticalPlane; and I do hereby declare the following to be a full, clear, andexact description of the invention,such as will enable others skilled inl the art to which it appertains to make and use the same. 1

It is well known that in firing a rifle at long range,if the sights areinclined to the right or left at all out of a vertical plane theprojectile will deviate to the right or left. Devices have been used toadjust the sights in a vertical plane; but they have all been expensive,and not capable of as accurate an adjustmentas is necessary. This is aserious objection, as the slightest variation of the sights from avertical plane will affect the course of the proj ectile.

The object of my invention is to produce a simple, cheap,and effectivesightplumb, which can be readily attached to the gun, will adjustitself, and by means of which the marksman can tell at a glance whetheror not the sights are in a vertical plane, and can, while aiming, adjustsaid sights in a vertical plane with the greatest 'nicety, thus securinga greater degree of accuracy when firing at long range. 7

My invention is particularly adapted for use with the ordinary rifledmusket.

It consists in a certain novel construction and arrangement of parts,all of which I will now proceed to point out and describe, referencebeing had to the accompanying drawings, in which- Figure 1 is aperspective of my invention, showing the cases opened. Fig. 2 is acrosssection of a musket-barrel provided with my invention, showing afront elevation of same. Fig. 3 is a rear elevation; Fig. 4, a sideelevation of a musket-barrel provided with my invention, and Fig. 5 atop plan showing method of attaching same to the barrel.

Referring to said drawings, A is the musket-barrel; B, the ramrod; O,the forward sight; 0, the rear sight; D, the bayonet-stud.

' E is a clamp adapted to fit around the bayonet-stud and be securedthereto by the clamping-screw e.

F is a gravitating ring surrounding the barrel and pivoted to the clampE at a point, f, in a line with the sights of the gun.

G is a pin projecting up from the top of the ring F, directly in frontof the pointf and in a line with the sights G c, and also in a ver ticalline with the center of gravity of the ring F. Said ring F issufficiently larger than the barrel to allow it to gravitate as thebarrel is turned to the right or left, thus causing the pin G always toremain in a vertical plane.

HH are cases or covers inclosing the ring F, and extending around thegun-barrel between it and the ramrod. These cases are hinged to oppositesides of the clamp, and are held together by a tongue, h, secured to onecase and entering a bearing, h, on the other. h is a set-screw by meansof which the cases can be adjusted to or from each other. Said casesprotect the ring from the action of the Wind. I

To use my invention, the cases H Hare opened,asshowninFig. 1.Theringisslipped over the barrel, and the clamp secured to thebayonet-stud, as shown in Figs. 2, 4., and 5. The cases are then broughttoward each other until they touch the barrel, and by tightening theset-screw are held securely in place. The ring, being larger than thebarrel and pivoted above the same, will gravitate as said barrel isturned, and the projecting pin G, being in a vertical line with thecenter of gravity of the ring, will always be in a vertical plane. Whenaiming, if the sights and pin register exactly in the same line, themarksman will know that the sights are in a vertical plane. If they donot register, it is evident that the sights are not in a vertical plane,and the barrel must be turned until said sights and pin register.

This device is simple and very effective, as the sights can be adjustedwith the greatest accuracy, as the ring is sensitive to the slightestturn of the barrel.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. A device foradjusting the sights ofagun[with the gun-sights the index-point will 00- in avertical plane,consisting of a gravitating ring encircling the barrel, and pivoted tosaid barrel at a point in a line with the front and rear sights, andprovided with an upwardlyprojecting pin directly over the pivot-pointand in a vertical line with the center of gravity of the ring,substantially as shown and described.

2. A device for adjusting the sights of a gun in a vertical plane,consisting of a pendulous weight having a pivot-bearing, and providedwith an upwardly-projecting pin over the pivot-bearing and in averticalline with the center of gravity of the weight, whereby when the weightis secured to a gun-barrel its pivot-bearing, being above the barrel andin a vertical plane with the gun-sights, the indexpoint will coincidewith the line between the sights when the latter are inla verticalplane, substantially as shown and described.

3. A device for adjusting the sights of a gun in a vertical plane,consisting of a gravitating ring having a pivot bearing, and providedwith an upwardly-projecting pin over the pivot-bearing and in a verticalline with the center of gravity of the ring, whereby when the ring issecured to a gun-barrel and encircles the same with its pivot-bearing ina plane incide with the line between the sights when the latter are inayertical plane, substantially as shown and described.

4. A device for adjusting the sights of a gun in a vertical plane,consisting of a clamp, a gravitating ring secured to the clamp by apivot, and provided with an upwardly-projecting pin over the pivot andin avertical line with the center of gravity of the ring, whereby whenthe clamp is secured'to a gunbarrel, the ring encircling the barrel andthe pivot being in a plane with the gun-sights, the index-point willcoincide with the line between the sights when the latter are in avertical plane, substantially as shown and described.

5. In a device for adjusting the sights of a gun in a vertical plane,the combination of the clamp E, gravitating ring F, secured to the clampby a pivot, and provided with the upwardly-projecting pin G, in avertical line with the center of gravity of the ring E, and the coversHH, hinged to the clamp,substantially as shown and described.

SYDNEY WEN'IWORTH TAYLOR.

Witnesses:

WILLIAM ENNIs, A. B. TAYLOR.

